SCons: Add GCC/Clang option to make debug file paths relative

This commit is contained in:
Rémi Verschelde 2023-06-14 17:03:10 +02:00
parent b2f425fe68
commit 74e6b5a059
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GPG key ID: C3336907360768E1

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@ -180,6 +180,7 @@ opts.Add(
)
opts.Add(BoolVariable("debug_symbols", "Build with debugging symbols", False))
opts.Add(BoolVariable("separate_debug_symbols", "Extract debugging symbols to a separate file", False))
opts.Add(BoolVariable("debug_paths_relative", "Make file paths in debug symbols relative (if supported)", True))
opts.Add(EnumVariable("lto", "Link-time optimization (production builds)", "none", ("none", "auto", "thin", "full")))
opts.Add(BoolVariable("production", "Set defaults to build Godot for use in production", False))
opts.Add(BoolVariable("threads", "Enable threading support", True))
@ -583,73 +584,6 @@ print(f'Building for platform "{selected_platform}", architecture "{env["arch"]}
if env.dev_build:
print("NOTE: Developer build, with debug optimization level and debug symbols (unless overridden).")
# Set optimize and debug_symbols flags.
# "custom" means do nothing and let users set their own optimization flags.
# Needs to happen after configure to have `env.msvc` defined.
if env.msvc:
if env["debug_symbols"]:
env.Append(CCFLAGS=["/Zi", "/FS"])
env.Append(LINKFLAGS=["/DEBUG:FULL"])
else:
env.Append(LINKFLAGS=["/DEBUG:NONE"])
if env["optimize"] == "speed":
env.Append(CCFLAGS=["/O2"])
env.Append(LINKFLAGS=["/OPT:REF"])
elif env["optimize"] == "speed_trace":
env.Append(CCFLAGS=["/O2"])
env.Append(LINKFLAGS=["/OPT:REF", "/OPT:NOICF"])
elif env["optimize"] == "size":
env.Append(CCFLAGS=["/O1"])
env.Append(LINKFLAGS=["/OPT:REF"])
elif env["optimize"] == "debug" or env["optimize"] == "none":
env.Append(CCFLAGS=["/Od"])
else:
if env["debug_symbols"]:
# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
# otherwise addr2line doesn't understand them
env.Append(CCFLAGS=["-gdwarf-4"])
if env.dev_build:
env.Append(CCFLAGS=["-g3"])
else:
env.Append(CCFLAGS=["-g2"])
else:
if methods.using_clang(env) and not methods.is_vanilla_clang(env):
# Apple Clang, its linker doesn't like -s.
env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
else:
env.Append(LINKFLAGS=["-s"])
if env["optimize"] == "speed":
env.Append(CCFLAGS=["-O3"])
# `-O2` is friendlier to debuggers than `-O3`, leading to better crash backtraces.
elif env["optimize"] == "speed_trace":
env.Append(CCFLAGS=["-O2"])
elif env["optimize"] == "size":
env.Append(CCFLAGS=["-Os"])
elif env["optimize"] == "debug":
env.Append(CCFLAGS=["-Og"])
elif env["optimize"] == "none":
env.Append(CCFLAGS=["-O0"])
# Needs to happen after configure to handle "auto".
if env["lto"] != "none":
print("Using LTO: " + env["lto"])
# Set our C and C++ standard requirements.
# C++17 is required as we need guaranteed copy elision as per GH-36436.
# Prepending to make it possible to override.
# This needs to come after `configure`, otherwise we don't have env.msvc.
if not env.msvc:
# Specifying GNU extensions support explicitly, which are supported by
# both GCC and Clang. Both currently default to gnu11 and gnu++14.
env.Prepend(CFLAGS=["-std=gnu11"])
env.Prepend(CXXFLAGS=["-std=gnu++17"])
else:
# MSVC doesn't have clear C standard support, /std only covers C++.
# We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
env.Prepend(CCFLAGS=["/std:c++17"])
# Enforce our minimal compiler version requirements
cc_version = methods.get_compiler_version(env) or {
"major": None,
@ -695,6 +629,9 @@ if methods.using_gcc(env):
"to switch to posix threads."
)
Exit(255)
if env["debug_paths_relative"] and cc_version_major < 8:
print("GCC < 8 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
env["debug_paths_relative"] = False
elif methods.using_clang(env):
if cc_version_major == -1:
print(
@ -717,12 +654,89 @@ elif methods.using_clang(env):
"support C++17. Supported versions are Apple Clang 10 and later."
)
Exit(255)
if env["debug_paths_relative"] and not vanilla and cc_version_major < 12:
print("Apple Clang < 12 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
env["debug_paths_relative"] = False
elif cc_version_major < 6:
print(
"Detected Clang version older than 6, which does not fully support "
"C++17. Supported versions are Clang 6 and later."
)
Exit(255)
if env["debug_paths_relative"] and cc_version_major < 10:
print("Clang < 10 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
env["debug_paths_relative"] = False
# Set optimize and debug_symbols flags.
# "custom" means do nothing and let users set their own optimization flags.
# Needs to happen after configure to have `env.msvc` defined.
if env.msvc:
if env["debug_symbols"]:
env.Append(CCFLAGS=["/Zi", "/FS"])
env.Append(LINKFLAGS=["/DEBUG:FULL"])
else:
env.Append(LINKFLAGS=["/DEBUG:NONE"])
if env["optimize"] == "speed":
env.Append(CCFLAGS=["/O2"])
env.Append(LINKFLAGS=["/OPT:REF"])
elif env["optimize"] == "speed_trace":
env.Append(CCFLAGS=["/O2"])
env.Append(LINKFLAGS=["/OPT:REF", "/OPT:NOICF"])
elif env["optimize"] == "size":
env.Append(CCFLAGS=["/O1"])
env.Append(LINKFLAGS=["/OPT:REF"])
elif env["optimize"] == "debug" or env["optimize"] == "none":
env.Append(CCFLAGS=["/Od"])
else:
if env["debug_symbols"]:
# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
# otherwise addr2line doesn't understand them
env.Append(CCFLAGS=["-gdwarf-4"])
if env.dev_build:
env.Append(CCFLAGS=["-g3"])
else:
env.Append(CCFLAGS=["-g2"])
if env["debug_paths_relative"]:
# Remap absolute paths to relative paths for debug symbols.
project_path = Dir("#").abspath
env.Append(CCFLAGS=[f"-ffile-prefix-map={project_path}=."])
else:
if methods.using_clang(env) and not methods.is_vanilla_clang(env):
# Apple Clang, its linker doesn't like -s.
env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
else:
env.Append(LINKFLAGS=["-s"])
if env["optimize"] == "speed":
env.Append(CCFLAGS=["-O3"])
# `-O2` is friendlier to debuggers than `-O3`, leading to better crash backtraces.
elif env["optimize"] == "speed_trace":
env.Append(CCFLAGS=["-O2"])
elif env["optimize"] == "size":
env.Append(CCFLAGS=["-Os"])
elif env["optimize"] == "debug":
env.Append(CCFLAGS=["-Og"])
elif env["optimize"] == "none":
env.Append(CCFLAGS=["-O0"])
# Needs to happen after configure to handle "auto".
if env["lto"] != "none":
print("Using LTO: " + env["lto"])
# Set our C and C++ standard requirements.
# C++17 is required as we need guaranteed copy elision as per GH-36436.
# Prepending to make it possible to override.
# This needs to come after `configure`, otherwise we don't have env.msvc.
if not env.msvc:
# Specifying GNU extensions support explicitly, which are supported by
# both GCC and Clang. Both currently default to gnu11 and gnu++14.
env.Prepend(CFLAGS=["-std=gnu11"])
env.Prepend(CXXFLAGS=["-std=gnu++17"])
else:
# MSVC doesn't have clear C standard support, /std only covers C++.
# We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
env.Prepend(CCFLAGS=["/std:c++17"])
# Disable exception handling. Godot doesn't use exceptions anywhere, and this
# saves around 20% of binary size and very significant build time (GH-80513).